Introduction

In this article, I would like to show you the basics of using a PostgreSQL database in your .NET application. The reason why I'm doing this is the lack of PostgreSQL articles on CodeProject despite the fact that it is a very good RDBMS. I have used PostgreSQL back in the days when PHP was my main programming language, and I thought.... well, why not use it in my C# application.

Background

I assume you have a basic knowledge of databases, SQL commands, and so on.

Why PostgreSQL

First and foremost, it's free*, in BSD-style freedom (both libre and gratis), which means you will not have license problems in your commercial applications. Next, you have a very good procedural language called PL/pgSQL (there are also the Java, Perl, Python, Tcl (and other) flavors). Lots of communities support it (large ones like Planet PostgreSQL, or blogs, for instance, "Depesz" blog), and finally, lot's of fun exploring this pearl of open source databases.

Installing PostgreSQL and the .NET data provider

First of all, go to the PostgreSQL website. PostgreSQL is known for having a very good documentation system. For the purposes of this article, I used PostgreSQL v.8.3.4 and PgAdmin III v. 1.8.4 (that comes bundled with PostgreSQL). Remember to install the database and PgAdmin III, but NOT Npgsql, since it comes with version 1.x and we're going to use v. 2.0. from a different package. Now, if you have a PostgreSQL server up and running (which is a really easy task), let's download some drivers. For this article, I have used NpgSQL2 built directly for MS .NET. When you download it, in the zip package (\bin directory), you will find Npgsql.dll, and that's the library we're looking for.

Playing with PgAdmin III

If you have ever worked with any DB-Management software like Aqua Data Studio, SQL Manager (I use the Lite version every day), or the MS Management Studio Express, you will find PgAdmin III really intuitive. It may not have that many gizmos as others, but it will do the job nicely. Here are a couple of daily tasks that you probably want to know how to do.

Creating a new user (unless you really don't mind playing with a super-user account ):

Creating a new database (fairly obvious, but nevertheless here it goes ):

Creating a table:

Adding stuff to tables (there are, of course, other ways, but I will let you explore this):

If you are looking for an MS-SQL Identity, just make your column type serial, or look for sequence in the documentation. OK, to be completely honest, PgAdmin III still needs work... numbers may not appear if you add a row through the grid, but believe me, they are there . You will see them the next time you reload a window with the grid.

Final words

This article is for those who have used a database for a couple of months (or even years) and would like to taste something different. If you are looking for a solid, stable, secure, and relatively fast database - PostgreSQL is for you. It costs 0.00 $, it has some cool features (look into the documentation and you will find them), and it is free.

I hope that you enjoyed my article

Really final words....

The project has two dependencies. The first is Npgsql.dll (provider) and the second is MultiCtrls (which is a DLL that was built in my other article). If something is wrong with the sources, please make references by hand (MultiCtrls is bundled with the ZIP file).

License

This article, along with any associated source code and files, is licensed under The BSD License